<template>
  <div>
    <h1>{{id ? '修改' : '新建'}}分类</h1>
    <el-form label-width="120px" @submit.native.prevent="save">
      <el-form-item label="父级分类">
        <el-select v-model="model.parent" clearable>
          <el-option v-for="item in parents" :key="item._id" :label="item.name" :value="item._id"></el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="名称">
        <el-input v-model="model.name"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" native-type="submit">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
export default {
  props: {
    id: String
  },
  data () {
    return {
      model: {},
      parents: []
    }
  },
  methods: {
    async save () {
      if (this.model.name.trim() === '') {
        this.$message.error('请输入分类名称')
        return
      }
      if (this.id) {
        await this.$http.put(`/rest/categories/${this.id}`, this.model)
        this.$message.success('修改成功')
      } else {
        await this.$http.post('/rest/categories', this.model)
        this.$message.success('保存成功')
      }
      this.$router.push('/categories/list')
    },
    async getName () {
      const { data: res } = await this.$http.get(`/rest/categories/${this.id}`)
      this.model = res
    },
    async getParents () {
      const { data: res } = await this.$http.get('/rest/categories')
      this.parents = res
    }
  },
  created () {
    this.id && this.getName()
    this.getParents()
  }
}
</script>

<style lang="less" scoped>
</style>
